Abstract: A light-emitting diode includes: a substrate, an epitaxial layer and a protective layer; the epitaxial layer is disposed on the substrate and includes a first semiconductor layer, an active layer, and a second semiconductor layer stacked sequentially in that order; the protective layer covers the epitaxial layer; the epitaxial layer is divided into chiplets, each chiplet includes transverse and longitudinal sidewalls intersecting in transverse and longitudinal directions, dicing channels are defined between adjacent chiplets, the dicing channels include transverse and longitudinal dicing channels extending respectively in the transverse and longitudinal directions, the protective layer covers the dicing channels and chiplet sidewalls, a patterned structure is disposed on the protective layer in an intersecting area of the transverse and the longitudinal dicing channels, and includes a groove extending toward the substrate.

Abstract: A LED chip includes a current blocking layer that includes a first portion and a second portion and a current expansion layer defined with a first opening; and the first portion is disposed in the first opening of the current expansion layer. A first gap is defined between the first portion and the current expansion layer; a second gap is defined between the first portion and the second portion; an electrode structure covers the first portion and is in contact with an upper surface of a semiconductor light-emitting sequence stacking layer through the first gap; at least a portion of an extension strip is formed on the second portion of the current blocking layer and the current expansion layer; a part of an edge of the first opening of the current expansion layer is disposed on the second portion of the current blocking layer.

Abstract: A light-emitting diode and a light-emitting device are provided. A transparent conductive layer, a current blocking layer and a first metal reflective layer are sequentially arranged on a side of a second semiconductor layer away from an active layer. A side of the first metal reflective layer adjacent to the current blocking layer is a first Al reflective layer, and metal Al has high reflectivity in a short-wave band, increasing the reflection of light radiated by the active layer. Since there is no need to form an adhesion layer between the first Al reflective layer and the current blocking layer, there is no light absorption problem of the adhesion layer. A projection area of the first metal reflective layer is greater than or equal to that of the transparent conductive layer, so that the first metal reflective layer can cover a larger light-emitting surface, thereby further improving the light reflection.

Abstract: A visualizable radioactive carbon microsphere (CMS) suspension, a preparation method, and a use thereof are provided. Every 1 mL of the visualizable radioactive CMS suspension includes: CMS: 10 mg to 500 mg; a therapeutic radionuclide with an activity of 5 mCi to 500 mCi; an imaging radionuclide with an activity of 0.1 mCi to 100 mCi; a small organic molecule: 0 mg to 100 mg; and a first solution: 0.1 mL to 1.0 mL. The preparation method mainly includes a process of allowing the CMS to adsorb the small organic molecule, the therapeutic radionuclide, and the imaging zirconium [89Zr]. The visualizable radioactive CMS suspension can realize both local radiotherapy and real-time imaging of a solid tumor lesion, and thus achieves the visualized treatment of a tumor, which provides a new radioactive CMS product that integrates diagnosis and treatment.

Abstract: A metal nuclide-loaded carbon microsphere (CMS), and a preparation method and a use thereof are provided. The preparation method includes: subjecting a metal ion and a small organic molecule to a reaction in an aqueous solution to obtain a complex; allowing a CMS to adsorb the complex; and subjecting the CMS adsorbing the complex to a first treatment. The metal nuclide-loaded CMS prepared by the method can stably exist in an aqueous solution at a temperature of lower than 180° C. and a pressure of lower than 10 MPa and has a metal nuclide dissolution rate of lower than 0.1% in the aqueous solution. After the prepared metal nuclide-loaded CMS is subjected to moist-heat sterilization at 121° C. for 15 min, a radionuclide release rate is still lower than 0.1%, which can significantly reduce the safety risk of the radioactive microsphere product in clinical use.